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Credit: AFP/Getty Images

Protesters marching with the social activist group CREDO along with other concerned citizens descend on the offices of the NRA's (National Rifle Association)Capitol Hill lobbiest's office demanding the pro-gun lobby stand down in reaction to the shooting at Sandy Hook Elementary School December 17, 2012, in Washington, DC. A leading Democratic senator launched a bid Sunday to ban assault weapons in the wake of the latest deadly US school shooting, announcing that she will put a bill before Congress on January 3.Dianne Feinstein, the influential chair of the Senate Intelligence Committee, said she believed President Barack Obama would support her legislation, also aimed at outlawing magazines carrying more than 10 bullets. AFP Photo/Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)